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201220211 = 1711836483
BaseRepresentation
bin10111111111001…
…10000001110011
3112000122001020102
423333212001303
5403003021321
631544503015
74662225563
oct1377460163
9460561212
10201220211
11a36467a5
125747aa6b
13328c381a
141ca1cda3
15129eac0b
hexbfe6073

201220211 has 4 divisors (see below), whose sum is σ = 213056712. Its totient is φ = 189383712.

The previous prime is 201220199. The next prime is 201220223. The reversal of 201220211 is 112022102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (201220199) and next prime (201220223).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-201220211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201220192 and 201220201.

It is not an unprimeable number, because it can be changed into a prime (201220711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5918225 + ... + 5918258.

It is an arithmetic number, because the mean of its divisors is an integer number (53264178).

Almost surely, 2201220211 is an apocalyptic number.

201220211 is a deficient number, since it is larger than the sum of its proper divisors (11836501).

201220211 is a wasteful number, since it uses less digits than its factorization.

201220211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11836500.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 201220211 is about 14185.2109959634. The cubic root of 201220211 is about 585.9904433360.

Adding to 201220211 its reverse (112022102), we get a palindrome (313242313).

The spelling of 201220211 in words is "two hundred one million, two hundred twenty thousand, two hundred eleven".

Divisors: 1 17 11836483 201220211